user
Write a response that appropriately completes the request.

### Instruction:
What are the important contributions of NASA to space exploration?

### Response:
assistant
NASA has made significant contributions to space exploration over the years, such as developing the first reusable spacecraft, launching satellites that have enabled global communication, developing an extensive catalog of the universe, and robotic explorations of other planets and moons. Their research has unlocked numerous scientific discoveries, which have greatly advanced our understanding of the universe and our place in it. NASA programs have also enabled inspiring leaps for humanity, such as walking on the moon, launching robotic explorers to Mars, and enabling space travel for regular citizens.